Last post on Jul 30, 2011 at 10:54 PM
You are in the Pontiac Bonneville
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Pontiac Bonneville, Engine, Sedan
#9 of 28 Re: car bucks like a mule [imidazol97]
Jan 24, 2008 (1:29 pm)
Hi, thanks for the quick response.the car has 291,000 km and I have done all the normal things when I purchase a used car. New battery rated for all the options and cold weather, new fuel filter, o2 sensor,plugs and wires, tranny fluid check, oil changed, and auto wrecker coils. Just did that this morning and started just fine but need to test drive. Had a friend do the code reading and it threw the codes for crank and cam sensors. would a dirty oily build-up cause any problems? or do I just pull the balancer and change them out?why would cooling down the car for only 10 minutes change anything if it was these sensors?Is there a relay that operates the TCC in the tranny? Oh ya, the car takes a fair amount of starter turning to fire it up. Could that be a weak fuel pump? Thanks again for your knowledge and effort helping me sort this out.
#10 of 28 Re: car bucks like a mule [gmonly4me]
Jan 24, 2008 (5:03 pm)
To test for a weak fuel pump or leakback of pressure when it's off, turn the key to ON and after 3 seconds you'll hear the fuel pump stop. Turn the key OFF and then back ON. Do that total of 3 times. That should repressurize the system. Then turn to START.
If it starts quickly that's a good sign you've got a problem with the fuel pump and the pressure valve.
The camshaft sensor is different than the crankshaft sensor. The symptoms worry me. They could be the ISC, the part that controls the three coil packs. Some people have had trouble with them.
Don't throw parts at it. At 188,000 miles you can have many problems. But most likely you have one problem.
The transmission could be the problem. Without driving it I can't tell. Does it do it when left in 3rd gear?
I'll send a longer list of things to your email box that's a part of Edmunds. Your user name plus carspace.com is your address. You access it in the gray bar across the top of each page has white text. The third from the right is your mailbox. You should be able to read an email from me there. Then you can respond here in the forum.
#11 of 28 Re: car bucks like a mule [imidazol97]
Jan 25, 2008 (10:31 am)
Hi again,I changed the coil packs and runs fine( 11.00 dollars) and yes it does do it in 3rd gear, but not in 1st or 2nd, so I'm thinking TCC is culprit. Would new trans filter and fluid with a Lucas tranny adative help this or should I think of installing the crank and cam sensors which is not that big of a deal for me.Oh yes, it seems that when I unlock the convertor via brake switch or adding throttle it doesn't seem to have these symtoms of surging or bucking. It certainly is intermittent so is not a major problem but would be nice to have car run like it should. By the way, I did a road trip last week of approx. 1800 miles and averaged 28 miles per gallon Canadian so the tune seems good. Thanks again for your help. Best regards
#12 of 28 Re: car bucks like a mule [gmonly4me]
Jan 25, 2008 (1:18 pm)
Sounds like it could be as simple as a loose or broken vacuum hose going to the TCC Solenoid. If the hose is fine then perhaps it's time for a new TCC Solenoid. Good luck, these types of problems can be tricky to solve.
Feb 09, 2008 (3:54 pm)
what are the voltage readings for 1992 SSEi, I,m checking the readings to determine if the tps is no good.thanks
#15 of 28 weird problem need help!
May 04, 2008 (6:30 pm)
Here it is..I have an 03' Bonneville SE and when I put it in reverse (only when it is not hot) it surges a lot. It doesn't surge in RPM's but you can really feel it surging in the engine. It will also do it when i am driving around 40ish and keep it at 1500. I was told that it probably wasn't tranny failure per se because once the car is warm it doesn't do this. I'm just looking for some answers.
#16 of 28 Surging while in Drive but stopped
Dec 30, 2008 (9:02 am)
I have a 98 bonneville, I just replaced the upper intake over the weekend, But now while at a stop light my car surges, If i shift to N, the surging stops somewhat, Is there something I missed while changing this out. Has anyone had this problem.
#17 of 28 Re: Surging while in Drive but stopped [asosocargirl]
Dec 31, 2008 (7:15 am)
You might have a vacuum leak somewhere. Check your hoses and connections involved with the UIM replacement. Look for rotted areas in hoses near the ends that might have cracked from moving them or stretching them.
You may have to clean your MAF or IAC if you didn't do that while the throttle body was off.
Check your screws holding down the UIM but don't overtighten them. They're supposed to be some low amount of inch-pounds--I'm thinking near 90 but don't trust my number.
Did you put both o-rings on the PCV valve. One at the top and one on the bottom. If not it sucks a lot of air from the crankcase. With the motor running take off the oil filler cap and see if you're getting a noticeable large volume of air flow.
#18 of 28 Re: Engine Surging Issues [brumby]
May 25, 2009 (6:06 pm)
I have a 2003 SSEi with similar problem, but not quite so severe. I also noticed that downshifting to 3rd seemed to alleviate the problem. This does two things; 1) increases engine rpm and power curve usage, and 2) decreases supercharger boost (usually eliminates boost, ending up somewhere slightly on the vacuum side of zero).
I found out it had a leaking lower intake manifold gasket. When boost was positive, oil, water and air could leak out slightly, due to the pressure, confusing the engine control module.
Fixed the gasket and the surge went away !